Lava flows, Kilauea volcano, Hawaii

The island of Hawaii (the "Big Island") is the location of the currently active volcanoes, Mauna Loa and Kilauea.The Hawaiian lavas are of two distinct forms, although chemically they are the same: *a'a* (viscous, rough) and *Pahoehoe* (smooth, ropy, billowy). This image shows a mixture of *a'a* and *pahoehoe* from the eruption of Mauma Ulu vent on the flank of Kilauea volcano. Mauna Ulu erupted between 1969-1974, cutting the Chain of Craters road as it cascaded down Holei Pali (cliff), a 1000ft escarpment on its way to the south-east Puna coast of the island.